/*!	 valuenode_timeloop.cpp
**	 Implementation of the "Time Loop" valuenode conversion.
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**	Copyright (c) 2007, 2008 Chris Moore
**  Copyright (c) 2011 Carlos López
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include "valuenode_timeloop.h"
#include "valuenode_const.h"
#include <synfig/general.h>
#include <synfig/localization.h>
#include <synfig/valuenode_registry.h>

#endif

using namespace std;
using namespace etl;
using namespace synfig;

REGISTER_VALUENODE(ValueNode_TimeLoop, RELEASE_VERSION_0_61_08, "timeloop", "Time Loop")

ValueNode_TimeLoop::ValueNode_TimeLoop(Type &x):
    LinkableValueNode(x)
{
}

ValueNode_TimeLoop::ValueNode_TimeLoop(const ValueNode::Handle &x):
    LinkableValueNode(x->get_type())
{
    Vocab ret(get_children_vocab());
    set_children_vocab(ret);
    set_link("link", x);
    set_link("link_time",  ValueNode_Const::create(Time(0)));
    set_link("local_time", ValueNode_Const::create(Time(0)));
    set_link("duration",   ValueNode_Const::create(Time(1)));
}

ValueNode_TimeLoop*
ValueNode_TimeLoop::create(const ValueBase &x)
{
    return new ValueNode_TimeLoop(ValueNode_Const::create(x));
}

LinkableValueNode*
ValueNode_TimeLoop::create_new()const
{
    return new ValueNode_TimeLoop(get_type());
}

ValueNode_TimeLoop::~ValueNode_TimeLoop()
{
    unlink_all();
}

bool
ValueNode_TimeLoop::set_link_vfunc(int i, ValueNode::Handle value)
{
    assert(i >= 0 && i < link_count());

    switch (i) {
    case 0:
        CHECK_TYPE_AND_SET_VALUE(link_,       get_type());

    case 1:
        CHECK_TYPE_AND_SET_VALUE(link_time_,  type_time);

    case 2:
        CHECK_TYPE_AND_SET_VALUE(local_time_, type_time);

    case 3:
        CHECK_TYPE_AND_SET_VALUE(duration_,   type_time);
    }

    return false;
}

ValueNode::LooseHandle
ValueNode_TimeLoop::get_link_vfunc(int i)const
{
    assert(i >= 0 && i < link_count());

    if (i == 0) {
        return link_;
    }

    if (i == 1) {
        return link_time_;
    }

    if (i == 2) {
        return local_time_;
    }

    if (i == 3) {
        return duration_;
    }

    return 0;
}

ValueBase
ValueNode_TimeLoop::operator()(Time t)const
{
    if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS")) {
        printf("%s:%d operator()\n", __FILE__, __LINE__);
    }

    Time link_time  = (*link_time_)(t).get(Time());
    Time local_time = (*local_time_)(t).get(Time());
    Time duration   = (*duration_)(t).get(Time());

    if (duration == 0) {
        t = link_time;
    } else if (duration > 0) {
        t -= local_time;
        t -= floor(t / duration) * duration;
        t  = link_time + t;
    } else {
        duration = -duration;
        t -= local_time;
        t -= floor(t / duration) * duration;
        t  = link_time - t;
    }

    return (*link_)(t);
}

bool
ValueNode_TimeLoop::check_type(Type &type)
{
    if (type != type_nil) {
        return true;
    }

    return false;
}

LinkableValueNode::Vocab
ValueNode_TimeLoop::get_children_vocab_vfunc()const
{
    if (children_vocab.size()) {
        return children_vocab;
    }

    LinkableValueNode::Vocab ret;

    ret.push_back(ParamDesc("link")
                  .set_local_name(_("Link"))
                  .set_description(_("The value node to time loop"))
                 );

    ret.push_back(ParamDesc("link_time")
                  .set_local_name(_("Link Time"))
                  .set_description(_("Start time of the loop for the value node Timeline"))
                 );

    ret.push_back(ParamDesc("local_time")
                  .set_local_name(_("Local Time"))
                  .set_description(_("The time when the resulted loop starts"))
                 );

    ret.push_back(ParamDesc("duration")
                  .set_local_name(_("Duration"))
                  .set_description(_("Length of the loop"))
                 );
    return ret;
}